The acetylation of 3-acylindoles.
作者:TOHRU HINO、YASUHIRO TORISAWA、MASAKO NAKAGAWA
DOI:10.1248/cpb.30.2349
日期:——
Acetylation of 3-acetylindole (9) with acetyl chloride-aluminum chloride in nitrobenzene or methylene chloride gave 3, 5-diacetylindole (10) as the major product, together with 3, 6- and 3, 7-diacetylindole (11, 12) as minor products. The similar acetylation of ethyl 3-indolecarboxylate (16) also gave the 5-acetyl derivative (17a) as the major product, together with the 6-and 7-acetyl derivatives (18a, 19) as minor products. Oxidation of 1, 3-diacetylindole (15) with lead tetratrifluoroacetate gave 3-indolinones (22, 23) and a dimeric product (24).
在硝基苯或二氯甲烷中,使用乙酰氯-氯化铝对3-乙酰基吲哚(9)进行乙酰化反应,主要得到3,5-二乙酰基吲哚(10),同时伴随产生少量的3,6-和3,7-二乙酰基吲哚(11, 12)。类似地,乙基3-吲哚羧酸酯(16)的乙酰化反应也主要生成5-乙酰基衍生物(17a),以及少量的6-和7-乙酰基衍生物(18a, 19)。使用四三氟乙酸铅氧化1,3-二乙酰基吲哚(15),得到3-二氢吲哚酮(22, 23)和一个二聚产物(24)。